Invertebrates 8

Question 1

Brief Evolution of Onychophora.

Answer 1

150spp.
Fossil is 540 mya
One family is Gondwanan distrubition - 9spp in NZ

Question 2

Ecology of Onychophora.

Answer 2

Terrestrial (humid)
Free living
Predatory

Question 3

Form and Function of Onychophora.

Answer 3

Lobopod (legs)
Antennae (top of head)
Jaws
Oral papilla (of slime gland)

Question 4

Why are Onychophora predatory?

And extra facts.

Answer 4

1. Capture prey using glue-like
2. Squirt from pores
3. They are prone to dessication
4. Doesnt stick on water repellent skin

Question 5

Evolution of Arthropoda.

Answer 5

Successful - 1 million sp.

Question 6

Ecology of Arthropoda.

Answer 6

Adapted to all habitat as Morphology is adaptable.

Question 7

What are the 4 subphylum? In Arthropoda.

Answer 7

1. Chelicerata (spiders, ticks, mites)
2. Crustacea (lobster, shrimps)
3. Myriapod (milli/centipedes)
4. Uniramia

Question 8

Chelicerata (spiders) body plan consists of?

Answer 8

2 segments are the cephalothorax and abdomen, joined by pedicel.
Carapace covers the upper surface.
4paired legs
Predators

Question 9

Crustacea (lobsters) body plan consists of?

Answer 9

• Cephalothorax
• 2 pairs of antennae
• Abdomen
• Usually biramous appendages
• Thorax

Question 10

Myriapod (milli/centipedes) body plan, form and functions are:

Answer 10

Uniramous appendages a series of segment attached.

• Diplopoda = milli
• predominantly carnivorous and venom claws = centi

Question 11

Extra subphylum is the:

Answer 11

Uniramia

Question 12

Uniramia CLASS: Insecta evolution is?

Answer 12

1 mill spp.

80%

Question 13

Ecology of Uniramia.

Answer 13

Terrestrial or fresh water

Question 14

What are Uniramia important to?

Answer 14

Important to ecosystem and humans.

Question 15

Are Uniramia:

1. Acoelomate?
2. Coelomate?
3. Pseudocoelomate?

Answer 15

2. Coelomate:

Main body cavity is haemocoel

Question 16

What kind if blood system does Uniramia have?

Answer 16

Open circulatory system:

• blood pumped by the heart (haemolymph)
• thro dorsal artery
• into blood sinuses (haemocoel)

Question 17

Uniramia have hard cuticles because:

Answer 17

1. Proves support (exoskel)
2. Protection
3. Internal muscle attachment
4. Water-proof case (allow invasion)
5. Provide adaptable outer covering (eco-interactions)
6. Shed (moult) for growth

Question 18

Uniramia is divided into 3 parts called:

Answer 18

Head, abdomen and thorax

Question 19

The abdomen of Uniramia consists of:

Answer 19

Organs and system

Eg. Sexual organs, excretory system

Question 20

The Thorax in Uniramia is specialised for:

Answer 20

Locomotion

• legs
• wings
• large flying muscles

Question 21

The head for uniramia is specialised for:

Answer 21

1. Feed: complex mouth (eg. Mandible)
2. Gather info and process (high cephalised):
   - - large brain + 2ndary brain (suborsophagael ganglion)
   - - complex eyes
   - - antennae (smell)
   - - palps (taste)

Question 22

Form and function of Uniramia:

Answer 22

1. Joined appendages
   - appendages
   - legs
2. Ventral nerve cord:
   - segmental ganglia
   - ganglia fuse to form brain + sub-oesoph. Ganglion

Question 23

Uniramia digestive system is

Answer 23

Complete: variable

Question 24

The feeding strategies for Uniramia in insects is:

Answer 24

Highly variable